don't notify on draft PRs (#6)

.github/workflows/codenotify.yml

@@ -1,4 +1,6 @@
-on: [pull_request]
+on:
+  pull_request:
+    types: [opened, synchronize, ready_for_review]
 
 jobs:
   codenotify:

README.md

@@ -77,7 +77,9 @@ a1b2c3...HEAD
 Add `.github/workflows/codenotify.yml` to your repository.
 
 ```yaml
-on: [pull_request]
+on:
+  pull_request:
+    types: [opened, synchronize, ready_for_review]
 
 jobs:
   codenotify:

main.go

@@ -34,6 +34,10 @@ func testableMain(stdout io.Writer, args []string) error {
 		return err
 	}
 
+	if opts == nil {
+		return nil
+	}
+
 	commits := opts.baseRef + "..." + opts.headRef
 	diff, err := run("git", "-C", opts.cwd, "diff", "--name-only", commits)
 	if err != nil {
@@ -51,7 +55,7 @@ func testableMain(stdout io.Writer, args []string) error {
 	}
 
 	if opts.author != "" {
-		fmt.Fprintf(verbose, "Not notifying pull request author %s\n", opts.author)
+		fmt.Fprintf(verbose, "not notifying pull request author %s\n", opts.author)
 		delete(notifs, opts.author)
 	}
 
@@ -112,6 +116,7 @@ type pullRequest struct {
 	User   struct {
 		Login string `json:"login"`
 	} `json:"User"`
+	Draft bool `json:"draft"`
 }
 
 func githubActionOptions() (*options, error) {
@@ -133,6 +138,11 @@ func githubActionOptions() (*options, error) {
 		return nil, fmt.Errorf("unable to decode GitHub event: %s\n%s", err, string(data))
 	}
 
+	if event.PullRequest.Draft {
+		fmt.Fprintln(verbose, "Not sending notifications for draft pull request.")
+		return nil, nil
+	}
+
 	commitCount, err := commitCount(event.PullRequest.NodeID)
 	if err != nil {
 		return nil, err